Wavy / Warping picture

[Wetworks]

Just looking for some help. I have a new Sharp image duel res chassis, I am getting a wavy/ warping picture on the left hand side. The monitor is mounted vertically. The picture warps / stretches upwards on the top left side and downwards on the bottom left ( about 1cm ) I have adjusted horizontal vertical pots, screen size, pin cushion etc to no avail.
Anyone shed some light on this?
Thanks

[grantspain]

did you test the monitor before you installed it in the cab?
is there a speaker mounted very close to the right hand side top of the tube?
is there a transformer any where near the monitor?

[essence25]

Would a small workbench fluorescent tube cause any problems if close to the back of the crt?

[grantspain]

Would a small workbench fluorescent tube cause any problems if close to the back of the crt?

should'nt affect the crt unless the flo tube is faulty and flashing,the only thing that affects the geometry of a crt is a magnetic field caused by either a tranformer or a speaker being far too close.
if you get dots and flashes(snowy effect) that usually a sign of interference which is normally caused by a faulty flo tube or a problem with iso transformer/mains filter or actual house electrics

[Kevin Mullins]

Does it degauss properly?
The color looks a tad off in that corner.

And the image looks a bit stretched vertically.
(can't quite make out the edge of the screen)
Which would actualy be a horizontal width adjustment.

[qrz]

monitor model #
assuming it is a monitor problem, check the output b+ from the regulator. should be a steady voltage while dispaying a static picture.  excessive ripple may be due to faulty filter caps or failing reg.....
(note : raw b+ may be 170v . regulated out may run from 100 -135v)
check hdrive bypass cap ( near drive xformer)    .1-10uF / 50-250v   typical values
also check the filter caps on scan derived supply 15/30 v sources , etc....

vertical linearity issues will be faulty cap(s) in yoke return ...   .1-47uF / 10-100v   
any 'lytic cap near a high heat source should always be suspect.. look for bulging , or evidence of electrolyte leakage.
 mfgrs like to put 'lytic caps far too close to heat sources.   i.e. engineered failure 

qrz

[Wetworks]

Thanks for the replies guys.
Sorry, I should of stated that I'm using a DC with a sync splitter, when I tried a normal 15khz PCB it seems fine. (see pic)
I have since been told elsewhere that it could be due to the amplitude or strength of the signal, and should lower the input strength. Not sure how to do that though

[Zebidee]

I'm using a DC with a sync splitter, when I tried a normal 15khz PCB it seems fine. (see pic)

What the heck is a "DC with a sync splitter"?  Is it designed for two monitors?

From my experience, your symptoms indicate a poor sync signal.  Could be caused by some resistance or interference on the sync line.  Try testing the resistance (low Ohms  setting, eg 200 on DMM) on the sync splitter's sync line.  If it is any more than a few ohms, that's your problem.